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Roseovarius tolerans

ABSTRACT: Roseovarius tolerans overview

PROVIDER: PRJNA303903 | ENA |

REPOSITORIES: ENA

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			Action	DRS
		Other
	SRR29630900_1.fastq.gz	Fastqsanger.gz
	SRR29630900_2.fastq.gz	Fastqsanger.gz
	SRR29630901_1.fastq.gz	Fastqsanger.gz
	SRR29630901_2.fastq.gz	Fastqsanger.gz

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Project description:N-acyl amino acid methyl esters (NAMEs), which are structurally similar to the signalling compounds N-acyl homoserine lactones (AHLs), have been identified in culture extracts of Roseovarius tolerans EL-164. However, previous studies have shown that NAMEs do not participate in AHL-mediated signalling and thus their ecological role remains unclear. To enable dose-dependent bioactivity-testing of NAMEs, we have established a quantification method for NAMEs. The concentrations determined for the major NAMEs produced by EL 164, C16:1- and C17:1-NAME, ranged between 0.7-5.7 mg L-1 and 5.3-86.4 µg L-1, respectively. We observed opposing production patterns for NAMEs and AHLs, with a continuously increasing NAME production during exponential growth and an accumulation in the stationary phase. We further conducted a spike-in experiment, using the previously determined metabolite concentrations. By comparing the transcriptomes of pre- and post-NAME or AHL spikes, we identified distinct impacts on gene expression patterns. Different genetic neighbourhoods were significantly up- or downregulated in NAME and AHL-spiked cultures. Yet no synergetic effect was observed. These findings exemplify the broad application range of dose-dependent testing and highlight the different biological activities of NAMEs and AHLs.

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